diff --git a/boot_node/src/lib.rs b/boot_node/src/lib.rs
index f066b6e41..2a5546663 100644
--- a/boot_node/src/lib.rs
+++ b/boot_node/src/lib.rs
@@ -9,6 +9,8 @@ mod server;
 pub use cli::cli_app;
 use config::BootNodeConfig;
 
+const LOG_CHANNEL_SIZE: usize = 2048;
+
 /// Run the bootnode given the CLI configuration.
 pub fn run(matches: &ArgMatches<'_>, debug_level: String) {
     let debug_level = match debug_level.as_str() {
@@ -26,7 +28,9 @@ pub fn run(matches: &ArgMatches<'_>, debug_level: String) {
         let decorator = slog_term::TermDecorator::new().build();
         let decorator = logging::AlignedTermDecorator::new(decorator, logging::MAX_MESSAGE_WIDTH);
         let drain = slog_term::FullFormat::new(decorator).build().fuse();
-        slog_async::Async::new(drain).build()
+        slog_async::Async::new(drain)
+            .chan_size(LOG_CHANNEL_SIZE)
+            .build()
     };
 
     let drain = match debug_level {
diff --git a/lighthouse/environment/src/lib.rs b/lighthouse/environment/src/lib.rs
index 549eeb089..81e8eee60 100644
--- a/lighthouse/environment/src/lib.rs
+++ b/lighthouse/environment/src/lib.rs
@@ -29,6 +29,7 @@ mod executor;
 mod metrics;
 
 pub const ETH2_CONFIG_FILENAME: &str = "eth2-spec.toml";
+const LOG_CHANNEL_SIZE: usize = 2048;
 
 /// Builds an `Environment`.
 pub struct EnvironmentBuilder<E: EthSpec> {
@@ -129,7 +130,9 @@ impl<E: EthSpec> EnvironmentBuilder<E> {
             match format.to_uppercase().as_str() {
                 "JSON" => {
                     let drain = slog_json::Json::default(std::io::stdout()).fuse();
-                    slog_async::Async::new(drain).build()
+                    slog_async::Async::new(drain)
+                        .chan_size(LOG_CHANNEL_SIZE)
+                        .build()
                 }
                 _ => return Err("Logging format provided is not supported".to_string()),
             }
@@ -138,7 +141,9 @@ impl<E: EthSpec> EnvironmentBuilder<E> {
             let decorator =
                 logging::AlignedTermDecorator::new(decorator, logging::MAX_MESSAGE_WIDTH);
             let drain = slog_term::FullFormat::new(decorator).build().fuse();
-            slog_async::Async::new(drain).build()
+            slog_async::Async::new(drain)
+                .chan_size(LOG_CHANNEL_SIZE)
+                .build()
         };
 
         let drain = match debug_level {
@@ -192,7 +197,9 @@ impl<E: EthSpec> EnvironmentBuilder<E> {
             match format.to_uppercase().as_str() {
                 "JSON" => {
                     let drain = slog_json::Json::default(file).fuse();
-                    slog_async::Async::new(drain).build()
+                    slog_async::Async::new(drain)
+                        .chan_size(LOG_CHANNEL_SIZE)
+                        .build()
                 }
                 _ => return Err("Logging format provided is not supported".to_string()),
             }
@@ -201,7 +208,9 @@ impl<E: EthSpec> EnvironmentBuilder<E> {
             let decorator =
                 logging::AlignedTermDecorator::new(decorator, logging::MAX_MESSAGE_WIDTH);
             let drain = slog_term::FullFormat::new(decorator).build().fuse();
-            slog_async::Async::new(drain).build()
+            slog_async::Async::new(drain)
+                .chan_size(LOG_CHANNEL_SIZE)
+                .build()
         };
 
         let drain = match debug_level {